0.6.0

• :before and :after pseudo-elements outline and shadow are now
  taken into account when calculating capture region(@incorp).

  This change can break some of your tests. Re-gather reference images
  to fix the problem.

• Added tolerance config option which can be used to specify maximum
  error rate before images will be treated as unequal.
  Default tolerance to 0. This is stricter then previous versions:
  now every, even slightest difference between reference and current
  images will fail tests.

  Set tolerance to 0.001 in .gemini.yml to restore 0.5.x behavior.

• Coordinates of capture region are now rounded to capture maximal area.
  Previously, border pixels could be cropped, due to rounding error.
  This change can break some of your tests. Re-gather reference images
  to fix the problem.

• Added ability to change diff highlight color in config file.

• Change diff highlight style

• Global installations of gemini now runs local one, if available.